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  1. #1
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    Default NL 90 not cooling on 12 volt

    HELP!!
    With just 2 days before we leave for a long awaited Botswana trip, I have just discovered my National Luna 90 litre fridge/ freezer does not cool when running on 12 volt.
    I thought it might be voltage drop from too thin a cable, but the amp meter tells me there is no drop. I have set the cut off voltage to the lowest but that didnít help.

    Anyone know if NL would be likely to check it out urgently?
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    Default Re: NL 90 not cooling on 12 volt

    I just had to fix my Luna. Turned out the controller was fubar. Worked on 12v but not on 220v

    Cost me 3k to put in a new controller

    But yours, have a look at the 15amp fuse on the connector for the 12v. Maybe it just blew?
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  4. #3
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    Default Re: NL 90 not cooling on 12 volt

    Quote Originally Posted by Enduroguy View Post
    HELP!!
    With just 2 days before we leave for a long awaited Botswana trip, I have just discovered my National Luna 90 litre fridge/ freezer does not cool when running on 12 volt.
    I thought it might be voltage drop from too thin a cable, but the amp meter tells me there is no drop. I have set the cut off voltage to the lowest but that didnít help.

    Anyone know if NL would be likely to check it out urgently?
    Mine did the same. End it was the fan not working. So when compressor got hot it cut out so it didnt cool or took hours to just get to.0. Also check.all your connections Good luck


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  6. #4
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    Default Re: NL 90 not cooling on 12 volt

    Quote Originally Posted by hein100 View Post
    Mine did the same. End it was the fan not working. So when compressor got hot it cut out so it didnt cool or took hours to just get to.0. Also check.all your connections Good luck
    Exactly my problem. The fan extracts hot air around the compressor motor.

  7. #5
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    Default Re: NL 90 not cooling on 12 volt

    Ours packed up in Bots enroute to CKGR...worked well as very expensive cooler box (with ice). Took it to NL to repair on our way back home. Technician informed us, "you must always have spare fan...they tend to break. It should be like a spare tyre." Needless to say, we now have spares...fan, fuses, cable etc.
    Last edited by LCDJ; 2021/05/15 at 11:09 PM.

  8. #6
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    Default Re: NL 90 not cooling on 12 volt

    Quote Originally Posted by LCDJ View Post
    Ours packed up in Bots enroute to CKGR...worked well as very expensive cooler box (with ice). Took it to NL to repair on our way back home. Technician informed us, "you must always have spare fan...they tend to break. It should be like a spare tyre." Needless to say, we now have spares...fan, fuses, cable etc.
    thanks for the info. Where does one get a spare fan?
    Iíve been a NL fan for more than 20 years as my original 40 litre never kissed a beat despite being used hard for all that time. My experience with their newer products has been very disappointing
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  9. #7
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    Default Re: NL 90 not cooling on 12 volt

    Quote Originally Posted by Nys View Post
    I just had to fix my Luna. Turned out the controller was fubar. Worked on 12v but not on 220v

    Cost me 3k to put in a new controller

    But yours, have a look at the 15amp fuse on the connector for the 12v. Maybe it just blew?
    thanks Gert for the info. It still runs, not sure if itís the compressor or the fan running, but temp stays at 18 or 20. Would it still run with a blown fuse?
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    Default Re: NL 90 not cooling on 12 volt

    Quote Originally Posted by Enduroguy View Post
    thanks Gert for the info. It still runs, not sure if it’s the compressor or the fan running, but temp stays at 18 or 20. Would it still run with a blown fuse?
    I don't think it would run at all if the fuse was blown. If the extractor fan was shot then the compressor runs for a short while then cuts off, starts again when it cools, then cuts. While it's running check whether hot air is being pushed out of the vents on the bottom right. If hot air not being extracted it's likely the fan is shot. If the noise is the fan running then it's more likely a compressor or controller issue.

    Edit - or it needs to be re-gassed. Entirely possible you've had a pipe leak. Everything running but no coolant effect.
    Last edited by Gungets Tuft; 2021/05/16 at 05:55 AM.

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  12. #9
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    Default Re: NL 90 not cooling on 12 volt

    Quote Originally Posted by Enduroguy View Post
    thanks Gert for the info. It still runs, not sure if itís the compressor or the fan running, but temp stays at 18 or 20. Would it still run with a blown fuse?
    Had gas leak issues on my 90L twice (posted in another thread), if everything runs and not cooling, sounds like gas problem.

    The compressor running has a "deeper" sound than the fan running, if you put your ear touching the side you can hear the humming sound of the compressor.

    If it is a leak, and depending on how fast it leaks, a temporary "fix" in an emergency case is to have it re-gassed. That is what I did in a similar situation to yours. The re-gas lasted about 6x weeks and was sufficient for my 2x week trip.
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  14. #10
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    Default Re: NL 90 not cooling on 12 volt

    May I offer a temp solution.
    If the cooling fan is not running, source a computer fan from an old pc or a friend etc. The big one.
    Mount it on the outside where the condenser side is with cable ties or wire or what have you make sure the arrow points to the outside ie extraction hot air from inside.
    Power it with an alternative 12v source.
    Leave it to run it wont hurt it .
    A emergency measure in your case.
    Good luck.

    Coenie
    Last edited by janseekat; 2021/05/16 at 08:41 AM.

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  16. #11
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    Default Re: NL 90 not cooling on 12 volt

    If at all possible drop by NL in Edenvale 1st thing tomorrow morning and explain the urgency.

    They are a great team and sure they can make a plan if possible.

    Just had 2x NL 72L's in for some work. 1x had to have a power unit replaced as the Fridge side stopped working whilst freezer worked great. Obviously now rush on our side but both sorted in just over a week.

    Holding thumbs!!
    Keep us posted

    Quote Originally Posted by Enduroguy View Post
    HELP!!
    With just 2 days before we leave for a long awaited Botswana trip, I have just discovered my National Luna 90 litre fridge/ freezer does not cool when running on 12 volt.
    I thought it might be voltage drop from too thin a cable, but the amp meter tells me there is no drop. I have set the cut off voltage to the lowest but that didn’t help.

    Anyone know if NL would be likely to check it out urgently?
    Last edited by Martinj; 2021/05/16 at 09:31 AM. Reason: Additionally commentary
    Martin Pienaar

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  18. #12
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    Default Re: NL 90 not cooling on 12 volt

    I posted which fridge to buy Snow Master vs National Luna. Outcome was 50/50...now it seems buying new SM is a better bet than the new NL.
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  19. #13
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    Default Re: NL 90 not cooling on 12 volt

    Quote Originally Posted by hunter26 View Post
    I posted which fridge to buy Snow Master vs National Luna. Outcome was 50/50...now it seems buying new SM is a better bet than the new NL.
    Had to re-gas my Snowmaster in the first year, and it didn't fit into either my Echo or Cheetah, so there's that.

  20. #14
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    Default Re: NL 90 not cooling on 12 volt

    Quote Originally Posted by Gungets Tuft View Post
    Had to re-gas my Snowmaster in the first year, and it didn't fit into either my Echo or Cheetah, so there's that.
    Oh bloody marvelous, just when I thought I had narrowed my choice down lol.
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  22. #15
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    Default Re: NL 90 not cooling on 12 volt

    My much abused engel 40L sounded like it was running, but no cooling occurred. Turned out it was the condenser, the cooling shell inside the fridge. R5k to fix.
    Stuart

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  23. #16
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    Default Re: NL 90 not cooling on 12 volt

    Thanks everyone for the advice/ suggestions. They did help me determine that the fan and compressor are indeed running, so the problem seems to be a lack of gas.
    I will take it to NL in Edenvale first thing tomorrow and beg them to sort it out double quick.
    👍🙏
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  25. #17
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    Default Re: NL 90 not cooling on 12 volt

    Any update on the NL visit and outcome. Hope they were able to sort it out for you.
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    Default Re: NL 90 not cooling on 12 volt

    By way of feedback -
    Took the fridge in to NL this morning, impressed to find them open at 7:30. They think it is gas leak related, which I would have thought is a simple problem to fix. Not.
    to find and fix the leak, then do the 3 tests required, takes 2 weeks 😢😒
    Fortunately they agreed to lend me a similar unit so I wonít have to eat dry bread and drink warm drinks for 2 weeks in Botswana. Thanks NL for the great backup service!✅🙏
    Turning a 10 minute job into an hour
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  28. #19
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    Default Re: NL 90 not cooling on 12 volt

    Quote Originally Posted by Enduroguy View Post
    By way of feedback -
    Took the fridge in to NL this morning, impressed to find them open at 7:30. They think it is gas leak related, which I would have thought is a simple problem to fix. Not.
    to find and fix the leak, then do the 3 tests required, takes 2 weeks 😢😒
    Fortunately they agreed to lend me a similar unit so I wonít have to eat dry bread and drink warm drinks for 2 weeks in Botswana. Thanks NL for the great backup service!✅🙏
    Cool and good to know they are helpfull. Ill see what mine does when we doing khaudum in july. So far its running and keep its temperature. Enjoy the trip.


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  29. #20
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    Default Re: NL 90 not cooling on 12 volt

    Just info:

    I run my 4x4 fridge 1x monthly but was slack with my NL twin 90l for 6 months.

    Started it but it did not seem to be starting properly. Called NL and they gave me a test to run.

    Take setting of temp on freezer to -24 and fridge to 0 and run. If temp when running gets to -12 to -15 reasonably quickly then gas is OK. The fridge side will cycle to about 4 apparently. This for my model which is older one 2009. Mine was OK and performed well on trip.

    Lesson learnt. Run fridges regularly!

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